<template>
  <el-select :disabled="disabled" ref="treeSelect" :value="valueTitle">
    <!-- <el-input
      class="selectInput"
      :placeholder="placeholder"
      v-model="filterText">
    </el-input> -->

    <el-option :value="valueTitle" :label="valueTitle" class="options">
      <el-tree
        id="tree-option"
        ref="selectTree"
        show-checkbox
        :accordion="accordion"
        :data="options"
        :props="props"
        :node-key="props.value"
        :default-expanded-keys="defaultExpandedKey"
        :filter-node-method="filterNode"
        :check-strictly="checkStrictly"
      />
    </el-option>
    <el-col style="padding: 10px; background: #e9edf1">
      <el-button @click="handleAllSelect">全选</el-button>
      <el-button @click="handleClear">清空</el-button>
      <el-button @click="handleSureClick">确定</el-button>
    </el-col>
  </el-select>
</template>

<script>
export default {
  name: "ElTreeSelect",
  props: {
    /* 配置项 */
    props: {
      type: Object,
      default: () => {
        return {
          value: "id", // ID字段名
          label: "title", // 显示名称
          children: "children", // 子级字段名
        };
      },
    },
    disabled: {
      type: Boolean,
    },
    /* 选项列表数据(树形结构的对象数组) */
    options: {
      type: Array,
      default: () => {
        return [];
      },
    },
    /* 初始值 */
    value: {
      type: Number,
      default: () => {
        return null;
      },
    },
    /* 可清空选项 */
    clearable: {
      type: Boolean,
      default: () => {
        return true;
      },
    },
    checkStrictly: {
      type: Boolean,
      default: () => {
        return false;
      },
    },
    /* 自动收起 */
    accordion: {
      type: Boolean,
      default: () => {
        return false;
      },
    },
    placeholder: {
      type: String,
      default: () => {
        return "检索关键字";
      },
    },
  },

  data() {
    return {
      filterText: "",
      valueId: this.value, // 初始值
      valueTitle: "",
      defaultExpandedKey: [],
    };
  },
  watch: {
    value() {
      this.valueId = this.value;
      this.initHandle();
    },
    filterText(val) {
      this.$refs.selectTree.filter(val);
    },
  },
  mounted() {
    this.initHandle();
  },
  methods: {
    // 初始化值
    initHandle() {
      if (this.valueId) {
        // this.valueTitle = this.$refs.selectTree.getNode(this.valueId).data[this.props.label]     // 初始化显示
        // this.$refs.selectTree.setCurrentKey(this.valueId)       // 设置默认选中
        // this.defaultExpandedKey = [this.valueId]      // 设置默认展开
        this.valueTitle = "指定部门";
      }

      this.initScroll();
    },
    // 初始化滚动条
    initScroll() {
      this.$nextTick(() => {
        const scrollWrap = document.querySelectorAll(
          ".el-scrollbar .el-select-dropdown__wrap"
        )[0];
        const scrollBar = document.querySelectorAll(
          ".el-scrollbar .el-scrollbar__bar"
        );
        scrollWrap.style.cssText =
          "margin: 0px; max-height: none; overflow: hidden;";
        scrollBar.forEach((ele) => (ele.style.width = 0));
      });
    },
    // 切换选项
    handleNodeClick(node) {
      this.valueTitle = node[this.props.label];
      this.valueId = node[this.props.value];
      this.$emit("getValue", this.valueId);
      this.defaultExpandedKey = [];
      if (!node.children || !node.children.length) {
        // 补录选择完选项不能收起
        this.$refs.treeSelect.blur();
      }
    },
    // 全选
    handleAllSelect() {
      let data = [];
      const getAllId = (items) => {
        data.push(items);

        if (items.children && items.children.length != 0) {
          items.children.map((e) => {
            getAllId(e);
          });
        }
      };
      this.options.map((e) => {
        getAllId(e);
      });

      console.log("全选", data);
      this.$refs.selectTree.setCheckedNodes(data);
      this.valueTitle = "全企业";
      this.$store.dispatch(
        "system/updateApproveOrgIds",
        this.$refs.selectTree.getCheckedNodes().map((e) => {
          return e.organId;
        })
      );
      this.$refs.treeSelect.blur();
      //  this.$refs.selectTree.setCheckedKeys(this.options);
    },
    // 确定选择项
    handleSureClick(node) {
      this.valueTitle = "";
      console.log(this.$refs.selectTree.getCheckedNodes(), "当前选中的节点");
      this.$store.dispatch(
        "system/updateApproveOrgIds",
        this.$refs.selectTree.getCheckedNodes().map((e) => {
          return e.organId;
        })
      );

      // this.$refs.selectTree.getCheckedNodes().map(e => {
      //   this.valueTitle = this.valueTitle
      //     ? this.valueTitle + "," + e.name
      //     : e.name;
      // });
      this.valueTitle = "指定部门";
      this.$refs.treeSelect.blur();
    },
    // 清空选择项
    handleClear() {
      // this.$refs.selectTree.setCheckedKeys([]);
      this.$refs.selectTree.setCheckedNodes([]);
      this.valueTitle = "";
      this.$refs.treeSelect.blur();
    },
    // 清除选中
    clearHandle() {
      this.valueTitle = "";
      this.valueId = null;
      this.defaultExpandedKey = [];
      this.clearSelected();
      this.$emit("getValue", null);
    },
    /* 清空选中样式 */
    clearSelected() {
      const allNode = document.querySelectorAll("#tree-option .el-tree-node");
      allNode.forEach((element) => element.classList.remove("is-current"));
    },
    filterNode(value, data) {
      if (!value) return true;
      return data.name.indexOf(value) !== -1;
    },
  },
};
</script>
<style scoped>
.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
  height: auto;
  /* max-height: 274px; */
  padding: 0;
  overflow: hidden;
  overflow-y: auto;
}
.el-select-dropdown__item.selected {
  font-weight: normal;
}
.el-pop {
  top: 304px !important;
}
ul li >>> .el-tree .el-tree-node__content {
  height: auto;
  padding: 0 18px;
}
.el-tree-node__label {
  font-weight: normal;
}
.el-tree >>> .is-current .el-tree-node__label {
  color: #409eff;
  font-weight: 700;
}
.el-tree >>> .is-current .el-tree-node__children .el-tree-node__label {
  color: #606266;
  font-weight: normal;
}
.selectInput {
  padding: 0 5px;
  box-sizing: border-box;
}
</style>
